6666641601 has 8 divisors (see below), whose sum is σ = 8890809984. Its totient is φ = 4443450480.

The previous prime is 6666641581. The next prime is 6666641603. The reversal of 6666641601 is 1061466666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6666641601 - 2⁹ = 6666641089 is a prime.

It is a super-2 number, since 2×6666641601² = 88888220472367686402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6666641603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228246 + ... + 255791.

It is an arithmetic number, because the mean of its divisors is an integer number (1111351248).

Almost surely, 2^6666641601 is an apocalyptic number.

It is an amenable number.

6666641601 is a deficient number, since it is larger than the sum of its proper divisors (2224168383).

6666641601 is a wasteful number, since it uses less digits than its factorization.

6666641601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488631.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 6666641601 is about 81649.5045973948. The cubic root of 6666641601 is about 1882.0696989896.

The spelling of 6666641601 in words is "six billion, six hundred sixty-six million, six hundred forty-one thousand, six hundred one".